Miniature pump

Abstract

A miniature pump includes a driving unit and an airflow control unit, which includes a bladder supporter, a compression unit, a valve base and an output valve. The compression unit has multiple intake valves and multiple bladders, each intake valve covers the corresponding intake through hole, each intake through hole is surrounded by a circular wall, wherein the circular wall is disposed on a bottom surface of the corresponding intake valve or a top surface of the corresponding bladder supporter. The valve base is arranged over the compression unit, and the valve base has multiple output through holes aligned with the bladders respectively. When the bladder is compressed, air inside the bladder is output via the output through hole and the output valve. When the bladder is decompressed, external air is introduced into the bladder via the intake through hole and the intake valve.

What is claimed is: 
     
       1. A miniature pump comprising:
 a driving unit; and 
 an airflow control unit driven by the driving unit to force fluid to be input or output through the airflow control unit, wherein the airflow control unit comprises: 
 a bladder supporter having a plurality of intake through holes; 
 a compression unit having a plurality of intake valves and a plurality of bladders, each intake valve covering the corresponding intake through hole, each intake through hole is surrounded by a circular wall, wherein the circular wall is in contact with a bottom surface of the corresponding intake valve, the circular wall occupying an area of the bottom surface of the corresponding intake valve, which is smaller than a total area of the bottom surface of the corresponding intake valve; 
 a valve base disposed over the compression unit, the valve base having a plurality of output through holes aligned with the bladders respectively; and 
 an output valve covering the output through holes, 
 wherein the valve base has a plurality of bladder sections aligned with the bladders respectively, each bladder section has an isolation wall around thereof, and any adjacent two of the isolation walls define an air channel therebetween, the valve base further comprises at least one air chamber, and each air chamber is connected with a corresponding one of the air channel, 
 a top cover disposed over the valve base, the top cover having a central air outlet, all the air channels are connected to a central area of the valve base, which is aligned with the central air outlet, 
 when the bladder is compressed, air inside the bladder is output via the output through hole and the output valve, 
 when the bladder is decompressed, external air is introduced into the bladder via the intake through hole and the intake valve. 
 
     
     
       2. The miniature pump of  claim 1 , wherein the bladder supporter has a plurality of receiving bores, each receiving bore accommodates the corresponding bladder. 
     
     
       3. The miniature pump of  claim 1 , wherein the valve base has a concave passage on a bottom surface of the valve base, the concave passage is interconnected between the intake valve and the bladder. 
     
     
       4. The miniature pump of  claim 1 , wherein the driving unit comprises a motor and a compression vane, the compression vane is coupled with a rotation rod of the motor. 
     
     
       5. The miniature pump of  claim 4 , wherein the compression vane has a plurality of connection slots, each connection slot is fastened to a bottom end of the bladder. 
     
     
       6. The miniature pump of  claim 1 , wherein the compression unit comprises a flat plate section on which the intake valves are located. 
     
     
       7. A miniature pump comprising:
 a driving unit; and 
 an airflow control unit driven by the driving unit to force fluid to be input or output through the airflow control unit, wherein the airflow control unit comprises: 
 a bladder supporter having a plurality of intake through holes; 
 a compression unit having a plurality of intake valves and a plurality of bladders, each intake valve covering the corresponding intake through hole; 
 a valve base disposed over the compression unit, the valve base having a plurality of output through holes aligned with the bladders respectively; and 
 an output valve covering the output through holes, each output through hole is surrounded by a circular wall, wherein the circular wall is in contact with a bottom surface of the output valve, the circular wall occupying an area of the bottom surface of the output valve, which is smaller than a total area of the bottom surface of the output valve, 
 wherein the valve base has a plurality of bladder sections aligned with the bladders respectively, each bladder section has an isolation wall around thereof, and any adjacent two isolation walls define an air channel therebetween, the valve base further comprises at least one air chamber, and each air chamber is connected with a corresponding one of the air channel, 
 a top cover disposed over the valve base, the top cover having a central air outlet, all the air channels are connected to a central area of the valve base, which is aligned with the central air outlet, 
 when the bladder is compressed, air inside the bladder is output via the output through hole and the output valve, 
 when the bladder is decompressed, external air is introduced into the bladder via the intake through hole and the intake valve. 
 
     
     
       8. The miniature pump of  claim 7 , wherein the valve base has a plurality of bladder sections aligned with the bladders respectively, the circular wall is surrounded along a complete rim of each bladder section. 
     
     
       9. The miniature pump of  claim 7 , wherein the bladder supporter has a plurality of receiving bores, each receiving bore accommodates the corresponding bladder. 
     
     
       10. The miniature pump of  claim 7 , wherein the valve base has a concave passage on a bottom surface of the valve base, the concave passage is interconnected between the intake valve and the bladder. 
     
     
       11. The miniature pump of  claim 7 , wherein the driving unit comprises a motor and a compression vane, the compression vane is coupled with a rotation rod of the motor. 
     
     
       12. The miniature pump of  claim 11 , wherein the compression vane comprises a plurality of connection slots, each connection slot is fastened to a bottom end of the bladder. 
     
     
       13. The miniature pump of  claim 7 , wherein the compression unit comprises a flat plate section on which the intake valves are located.